Put ReiNX folder on the root of your switch's SD card and run ReiNX.bin with your favorite fusee launcher.
Compiling:
You'll need devkitpro with devkitARM and run make
To compile with Docker, chmod +x docker-build.sh and run the shell script ./docker-build.sh. After that, just check out dir. This will compile without requiring installation of DevKit* dependencies.
Features:
Modularity (doesn't rely on or require any SD files to run; customize SD files to your liking)
Loads all KIPs from /ReiNX/sysmodules/ directory
Optional custom kernel/secmon/warmboot
FS patches on the fly (NCA verify/cmac and optional nogc)
Kernel patches on the fly (optional debug mode)
Exclusive ReiNX sysmodules
ES patch in RXP patch format (used with custom loader.kip)